Wordpress is suitable for a lot of things, and for sure for your case it also is. Even if you needed ecommerce, wordpress is good for small companies to sell with woocommerce.
Anyway, you say you prefer quick site perfomance, so I'd say not to use a pre-made template. Not that they aren't good, but they usually come with a lot of useless features that clog your site. A custom made website will definitely help you achieve a score of over 90.
Also, with a custom-made website, you'll have a user interface that fits your goal and the needs of your B2B clients. It's just a money waste to build a site that's not useful, that people get frustrated with it and leave it without converting.
If you need help, we can help you understand what your clients want to see in your site and provide you a good, fast website that converts. I'm available for a call, let me know.